Truncation and Wild
Cards
Truncation and wildcard symbols stand for one or more letters within,
or at the end of, a search term.

It is important to note that the symbols used for this will vary widely from one research tool to another. The ?, $, and * symbols are most common, but they will behave differently in different databases or search engines.

Truncation
Added to the stem of a word, a truncation symbol will find that stem
plus anything that comes after it. The symbol used to truncate a word
depends upon the database or Web search engine you are using.

market?
will return records on market, marketing, markets. ? is used as the truncation symbol, for example, in
ABI/Inform
Global and the library catalog.